A portable underwater sound-pressure measuring system was developed and tested. The system was shown to be capable of measuring very low ambient-noise levels. High self-noise levels at frequencies less than 50 to 63 Hz are likely to be present if measurements are made from a drifting ship, and the cable is towed at drift velocity, probably because of a combination of flow noise and noise arising from cable vibrations. These high self-noise levels can be satisfactorily eliminated by using a slack cable system as described in the report. (Author)
A Portable, General-Purpose Underwater Sound Measuring System
1967
49 pages
Report
No indication
English
Angus, a navigable general-purpose underwater surveyor
Tema Archive | 1975
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